Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi than hoc snippets" » "khi thai hoc snippets", "thi than hoc snippets", "khi nhan hoc snippets", "khi toan hoc snippets", "khi than doc snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("khi than hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi than hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi than hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi than hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.